Telephone-exchange system



4 S. B. WILLIAMS ET AL TELEPHONE EXCHANGE SYSTEM Filed Oct. 31. 1925 2 Sheets-Sheet 1 y @JW. my

Jain. 13, 1925. 1,522,930

s. B. WILLIAMS ET AL TELEPHONE EXCHANGE SYSTEM Filed Oct. 31. 1923 2 Sheets5heet 2 Wye/#05? 54/7706/5 /1 ////d/77. [4M5 an;

Patented Jan. 13, 1925.

SAMUEL B, WILLIAMS,

OE? BROOKLYN, NEW YOLR-K. AND EARL S. GIBSON, OF RIDGE- woon, new anasar, assrenons TO wnsrann ELELJTRIC COMPANY, INCORPO- RATED, or NEW YORK, N. Y.. a. oonrona'rion or NEW YORK.

TELEPHONE-EXCHANGE SYSTEM.

Application filed October 31, 1923. Serial No. 671,885.

To all whom it may concern:

Be it known that we, SAMUEL B. WIL- LIAMS and EARL S. GmsoN, citizens of the United States of America, residing at- Brooklyn, in the county of Kings and State of New York, and Ridgewood, in the county of Bergen and State of New Jersey, respectively, have invented certain new and useful Improvements in Telephone-Em change Systems, of which the following is a full. clear, concise, and exact description.

This invention relates to telephone sys tems ant. particularly to systems in which automatic switching apparatus is employed.

The object of this invention is to increase the efficiency of telephone systems by shifting the preference of senders for switch controlling markers, with which they are connectible, under manual control.

A feature of the invention relates to an arrangement in which groups of register senders, each having access normally to a diiierent controlling marker, and wherein manualmeans serves to render any group connectible with another of said markers.

Another feature relates to the provision (it a spare marker common to all groupsof senders together with manual keys for rendering such marker first choice to any desired group of senders.

Referring to the drawing, Figs. 1 and 2, taken together illustrate a portion of an automatic telephone system sufiicient .to enable an understanding of the invention.

Fig. 1 shows in a diagrammatic manner, a group of register senders of the central. ofiice type. and a group of switch controlling mechanisms-or markers together with a connecting medium for connecting said senders to the markers.

Fi 2 illustrates, in diagrammatic fashion, a second group of senders together with a second connecting medium for connecting such senders to the markers illustrated in Fig.1.

In systems of the character to which the present invention is particularly applicable. register senders are provided at the central oflice for receiving records of thecalled subscribers lines. 7 In addition to these senders, a number of switch controlling mechanisms or markers are also provided. These markers are arranged to be associated with the register senders atthe time a call is taking place for the purpose of receiving from the senders information relating to the wanted subscribers line. Upon receiving this information, the marker is in a position to exorcise control over the selective switches which establish a talking connection between the calling and called parties.

Because of the fact that it is economical to provide a large number of senders in com parison to the number of markers, it becomes expedient to divide the senders into a number of groups making each group of senders normally connectible to a particular one of the markers as its first choice.

ith reference to the drawing, Fig. 1 illustrates a group of senders, two of which, 100 and 101 are shown. These senders ap pear in the multi-contact relay connecting device 105. Fig. 2 illustrates a second group of senders of which the senders 200 and 201 are a part. This group of senders appears. in the multi-contact relay connecting device 205. 11 number of markers, 102, 103 and 104 are shown, each having an appearance in each of the connecting devices 105 and 205. It will be understood that ad ditional groups of senders may be involved, each group appearing in similar connecting devices. The markers shown and such others as may be provided are multipled so as to have an appearance in all of the connecting devices.

The group of senders including senders 100 and 101 is arranged to have access normally to the marker 102, the circuits being so taken that only one sender at a time may be connected to this marker. Likewise, the group of senders including senders 200 and 201 normally have access to the second marker 103 astheir first choice. The third marker shown, namely. marker 104,. is a spare equipment and may be rendered available to the senders of any of the several groups as will be pointed out hereinafter. It, for any reason, the marker which normally serves a given group of senders should be taken out of service temporarily, or,.if for any other cause it is desired to shift the preference this may be done by manipulating certain keys shown in Figs 1 and 2. The manipulation of these keys serves, for example to render marker 103 available as first choice to thegroup of senders 100, 101. In a like manner, the manipulation of these keys may serve to render the marker 102 as the first choice marker of the group of senders 200, 201.

The general character of central oilice register senders, such as are suitable for employment in a system of this character, is well known in the art. The switch controlling devices or markers disclosed diagrammatically in this case are also in their general nature similar to register senders in that they receive records of calling lines and control in accordance therewith the setting of automatic switches. For a more detailed description of equipment of this character, reference is made to the application of S. B. Villiams, Serial No. 596,179, filed October 23, 1922.

lVith particular reference to the detailed operation of the circuits, assume that it is desired to associate the sender 100 with its firstchoice marker 102. VV-hen it is desired to effect a connection between the sender 100, and the marker 102 the relay 112 is operated by means of a circuit completed over conductor 121 in any suitable manner. Helay 112 causes the operation of relay 114.- in a circuit from battery through the lower winding of relay 1.14, lower front contact of relay 112, lower back contact of relay 1.11, left back contact of relay 116, and left back contact of slow relay 115 to ground.

Relay. 11-1 operates and causes the operathrough the windin of relay 1.15, inner right-back contact 0" relay 116, lower contact of relay 1141, and upper contact of relay 11210 ground. Relay 115 operates relay 116 and provides a holding circuit for relay 11 1 as followspbattery, through the upper winding of relay 111, inner upper contact of said relay, inner upper contact of relay 113, winding of relay 116, continuity contact and left armature of relay 115 to ground, Relays 11st and 116 lock in a circui-t from battery, through the upper Windi nig, and inner upper front contact of relay 1 14, inner-upper back contact of relay 113, winding and inner right contact of relay 1.16, lower. contact of relay 114 and upper contact of relay 112 to ground. Relay 116, in operating, releasesthe relay 115. After an interval, relay 115 becomes fully released and operates the multi-contactrelay 110 which is individual to the marker 102 n the connectingdevice 105. The circuit may betraced from ground, through the'right contact of relay 115, outer right contact of relay 116, back contact of relay 117, key 11 8 and its normal contact, winding of the migiltrcontactrelay 110 to battery Furthermore, the relay 115, in releasingoperates the multi-contact relay 106 whereby the conductors leading from the sender 100 are connected to the corresponding conductors of the connecting device 105, The circuit for succeed in closing the'circuit for the relay .113 due to the fact that relay 116 is energized.

When the. connection is no longer desired between. the sender 100 and the marker 102, the relay 112' is released by opening the circuit of the conductor 121. Relay 112 causes the release of relays 114 and 116. Relay .114 causes the release of relay 106 and relay 11.6 releases relay 110. Thus, the sender 100 is disconnected from the marker 102.

in a manner similar to that described above 1n detail, oneof the senders 200 or 201 of the-second group of senders may obrain connection with the first choice marker 103. If, for instance, the sender 201 is functioning to connect with a. marker, relay 211 in operating causes the operation of relays. 213, 215 and 216. Relay 215 then. releases and causes the operation of the multi-contact relays 207 and 209. Vith the multi-contact relays operated, the sender 201 is connected through the device 205 to the marker 1023. if thesender 200 desires connection with the marker 1.03,1relay 212 is operated. 11elay 212 causes the operation of relays 211, 216 and 215 whereupon the multicontact. relays 206 and 209 are operated and the sender 200 is connectedthrough the device 205. to; the-marker 103. j a

It. will-next be assumed that for. some reason or other it is desirable toremove the marker 102v-from service, In order not to deny service to the group of senders 100,101, the marker 103 which normally serves as first choice for the group of senders 200,201 may be placed for thetimebeing at the disposal of senders 100, 101 as'well. To-accomplish this, the keys 118 and 119 are. thrown to their operated positions. .When new the sender 100 desires to be connected to a m-arkerand relay 112 is operated, it in' 7 turn causes the -operation-of relays-114e, 1 15 and 116. Relay 115, aft'eranintervahreleasesand closes a ,circuit for relay 221 traceable from ground-,fover the right con- I of relay- 221 to battery. Relay 221. causes the operation of relay 222 in circuit from a battery, through thetloweig winding of .the ;.devi,ce.205. ilhisisdue tothc fact that the latter relay, loivelnfnont.contactof .relay.221,

loaveiuback contacts otrelays212 and .1211,

assuming. thatneither ot thesenders 200 and 201 is attempting.connection at .this time,

leftv back contact .of;i*elay ,216,. and normal and upper contact of. relay 221. .toground. The operation. of .re1ay'215 .causes .the. opera' tion ofrelay 2l6. in the.-ifolloyvingcircuit: battery, through .the .upper winding .and. up-

.per inner contactotrelay. 222 upperback contacts ofrelays 21 1and 213,,Winding of:

relay 216 andconthmity contact .of-relay 215 to ground. .Relay 2l6coperates and the following locking circuit isclosed for relays 222 and 216i battery throughthe upperivind :ing and .front contact of relay 1222, thence astracedthrough the .winding of relay 216,

inner right front contact ofsaid relay, and

lower contact of. relay 222 110 ground at the upper contactof relay 221. Relay 216 opens,

the circuit of relay 215 which, after ,ani'nterval, releases. ultelay .222, ;in operating, operates the ;relay 217 .in' a circuit from battery, throughcthe Winding of. the .latter relayy. uppermost. contact of relay 222 i to ground. l

' When relay 215 .fully releases, itcloses a circuit for the. inultiecontact.relay .109 .n'hich is individual to themarker 103 at the connecting device 105."w'lhe circuit involved may be traced from .ground, through the right contact of relay 215,.r1ght front con-...

tact of relay 216, trontcontactof.relay 217,

i of multi-contact relay 106.

being connected to the marker 102 which normally is its first choice marker.

It Will be noted that the common controlling relays associated With the connect ing device 205 areta-ken into operation for connecting one of the senders in the group 100, 101 to the marker 103. This is due to the fact that the marker 103 is normally the first choice marker for the group of senders 200 and 201. During the time that both groups of senders are having access to the same marker 103, it is necessary for both control circuits to cooperate With each other in order to prevent interference. lVhile the sender 100 is in connection with the marker 103 through the connecting device 105, it Will be impossible for one of the senders 200, 201, etc., to obtain connection to the same marker through the connecting at. r to .those 1 liereinbeioretraced. .c'aizs cathe,operation of .relay .226 .Which in and uppercontact of relay 221 to: .'.lfi10lln(l. Relay 227 releases relay 226. 1 Re- ;lays225.alsooperates rclay228 inan obvious ,circuit. :Atterrelay226 is tullyreleased it is .cil'ected by opening the. circuit of relay 11112.; iRelay .1112 cansestherelease of relays 114. and 11 1.6. Belay S116 .releases relay r106 canal .alsoa'elay2211. R-elay 221 releases rea\ 222....and :216. In order tocplace the 15 102 back iirservlce as first choice foitthegronp 0t senders 100, 101 itisonly necessary to release .the. keys 118 and. 119.

1n a similar .inannerit will be found from I inspection .otthecircuits that the oliieration l .oi .li'eys' :218 and 1219 -.renders the marker 102accessiblc to the group ot scndei's.200

.and.201.

T :Itit should be dlesiredto place the spare marker 101lin condition to be sele ted .by: u the group of senders.100,=101, keys;1 18 and 120 .are thrown. In this case when relay .1114'5Mreleases, as above described, it causes .the operation of relay 224 in a circuit.trace- .able from ground, through .the right coma .tactoofirelay 115, right front of relay 116. abaclccontact ofrelay 117, ttront.ottnormal .contactot key 118. normal contact ot key 11-19; .l icy P120. conductor-123, and. Winding o'l' relay 224 to battery. Relay 22 lcauses i the. operation: of .relayi225 in a circuit simi- Relavi225 :nicausesthe operation of relay 227. ,Rel ay ..an l. relay 225 .as follows: battery, through vthe-Mapper.winding and inner contact of relay c227.winding and inner right front contact ot relay.22i,,lon er Contact otv relav closes a circuit for the multi-rontact relay 108, traceable from ground through the right contact of relay 226, outer right con tact of relay 227, contact of relay 228. upper middle contact of relay 227, conductor 229 and Winding of relay 108 to battery. The spare marker 10%. is now rendered accessible to the group of senders and 101.

In the manner above described, relay 115 releases and causes the operation of relay 106. Both relays 106 and 108 being oper ated. the sender 100 is connected through the device to the spare marker 104.

When release is desired, relay 1-12flis deenergized. causing the release of relays 111 and 116. Relay 116 releases relay 22 1 Which in turn releases relays 225 and 227. Relay 225 releases relay 228. Relay 225. in releasing, causes the release of relay 108. Thus, the marker 10 1 is disconnected from the sender 100.

In a similar manner the spare .inarker 7104: may be rendered available to the senders of the second group 200, 201 by throwing the keys 219 and 220.

The invention claimed is:

1. The combination of a plurality of which is normally accessible to a particular sender also accessible to another sender.

2. The combination of a plurality of senders, a plurality of switch controlling markers, means for connecting said senders to said markers, each sender normally having access to a different one of the markers, and manual means for rendering any marker inaccessible to the corresponding sender and for rendering one ofthe remaining markers accessible to said sender.

3. The combination of a plurality of senders, a plurality of switch controlling markers, means for connecting said senders to said markers, each sender normally having access to a different one of the markers, and manual means for disabling one of the markers and means for rendering another marker accessible to a plurality of said senders.

4. In combination, a number of groups of senders, a plurality of switch controlling markers, means for connecting said senders to said markers, each group of senders normally having access to a different one of the markers, and manual. ineans'for rendering a marker which is normally accessible to a particular group of senders accessible to another group of senders.

5. In combination, a number of groups of senders, a plurality of switch controlling markers, means for connecting the senders to the markers, each group of senders nor- 'niallyhaving access to a different one of the markers, manual means for disabling one of saidmarkers andf'or rendering the senders of two different groups accessible to one of the remannng markers, and means having access to a different one of said markers, a multicontact relay device for connecting each group of senders to the corresponding marker, and manual means for rendering the marker which is normally accessible to a particular'group of senders accessible to anothergroup of senders.

7. In combination, a number of groups of senders, a switch controlling marker for:

each group of senders and normally accessible thereto as first choice, means for con-= necting the senders to themarkers, a spare marker common to all groups of senders,

and manual means for rendering said spare marker accessible to any of the groupsof senders. v i 8. In combination, a. plurality of senders, a plurality of switch controlling markers,

means for connecting said senders to said markers, each sender normally having access to a different one of the markers as first choice, a plural1ty of keys, and

means responsive to the operation of a com-' bination of saidkeys forrendering the markerwhich is normally accessible to a particular sender also accessible to another of said senders. r

In witness whereof, we hereunto subscribe our names this 27th day'of October, A. D.

SAMUEL B. WILLIAMS. EARL s. GIBSON. 

